So if one wants to achieve his target at least, can he do it?
Yes, of course.
How?
Get a White-collar job or work for money till crypto is in decline mode. Bounties can't really give you a living, man! So, stop depending on them and change your mindset! Was crypto there during the times when "Bill Gates" and "Warren Buffett" were creating their own history? Not saying anything against crypto, but then, if you want to make it everyday, you need to work for it everyday. Even your "buy low, sell high" strategy would work, but it depends on your entry and exit points, so following a few good people could help you out in that case.
What were your successfully trades like?
How to do it consistently...
I can't answer you first one as I don't prefer to, but about doing it consistently - nobody in this world can profit continuously and losses are good to teach you your mistakes. Another thing to remember: Buy when there's blood on the streets (but DYOR even before getting into a coin that's dropped down even 100 times, because chances are, it could gain at least 2-3x even 5x in few months 99%, and it could also drop further continuing the downside struggle due to non-use of that coin or any specific reasons and let's keep it 1% chance to happen, but still; sometimes 1% could blow your expectations as well).